I'm currently trying convert some flow plasma gas from Metco FMR to NLPM. I look in web site calculator, but I have a small problem, one of flow to translate is Nitrogen and flow is avaible for Helium secondary plasma gas flow tube! Can I use the Nitrogen primary plasma gas flow correction calculator for this translation?

I'm currently trying convert some flow plasma gas from Metco FMR to NLPM. I look in web site calculator, but I have a small problem, one of flow to translate is Nitrogen and flow is avaible for Helium secondary plasma gas flow tube! Can I use the Nitrogen primary plasma gas flow correction calculator for this translation?

Regards

Olivier

I answer to myself.

I have seen in conversion formula, as primary gas and helium secondary gas are calibrated by nitrogen, use nitrogen converter should answer to my question.

Yes as long as the helium flow tube is calibrated the same (nitrogen at 50 psi @ 70F). If you pass nitrogen at 50 psi and 70F the helium flow meter should give a direct read-out in SCFH for nitrogen. Use Nitrogen Primary Plasma Gas Flow Calculator if using different pressures or different flow units.

Yes as long as the helium flow tube is calibrated the same (nitrogen at 50 psi @ 70F). If you pass nitrogen at 50 psi and 70F the helium flow meter should give a direct read-out in SCFH for nitrogen. Use Nitrogen Primary Plasma Gas Flow Calculator if using different pressures or different flow units.